Domhnall Caomhánach

King of Leinster After the death of his father Diarmait Mac Murchada (English: Dermot Mac Murrough) in 1171, Domhnall was proclaimed King of Leinster by some clan chiefs, in line with the traditional Brehon law. Domhnall's legitimacy to the title was widely disputed by the Cambro-Norman invaders who viewed that their leader, Strongbow (Richard de Clare, the 2nd Earl of Pembroke), was the legitimate successor due to his marriage to Domhnall's sister Aoife/Eva and that Domhnall's claim was "illegitimate" under Norman law.

In any case, Diarmait had given Leinster as a dowry with Aoife/Eva on her marriage to Strongbow, and there is no record that Domhnall publicly opposed her endowment at the time of her marriage.

In 1175, it is recorded in the Annals of the Kingdom of Ireland that Domhnall was killed by O' Foirtchern and O' Nolan during the Battle of Naas. He is buried near his father Diarmait Mac Murchada in the Cathedral graveyard of Ferns village. After his death, Domhnall was succeeded as King by his grandson Muirchertach, the son of Domhnall Oge Caomhánach.